Letter of Credit (LC): Meaning, Types & How It Works (2026 Guide)

Imagine selling goods worth crores to a buyer 8,000 km away whom you have never met. Will they pay after you ship? This single fear has stalled trade for centuries.

The Letter of Credit (LC) solves it elegantly. A bank steps in. Examines the paperwork, and pays on the buyer’s behalf.

Trust is replaced by a bank guarantee.

For working bankers and exam aspirants. The Letter of Credit is non-negotiable knowledge. It shows up across Accounting & Finance for Bankers.

Bank Financial Management and the trade-finance modules. Master it once, and you unlock easy marks plus real branch-level confidence. This 2026 guide breaks down every concept in plain English.

What Is a Letter of Credit (LC)?

A Letter of Credit is a formal undertaking issued by a bank guaranteeing that a buyer’s payment to a seller will arrive on time. For the exact amount. If the buyer cannot pay. The issuing bank must cover the full or remaining sum.

The key idea is simple. The seller no longer relies on the buyer’s goodwill. Instead, the seller relies on the bank’s creditworthiness.

Because international trade spans long distances. Different legal systems and unfamiliar counterparties. The LC has become one of the most trusted payment tools in cross-border commerce.

An LC deals in documents, not goods. Banks never inspect the cargo. They check whether the paperwork — invoice. Transport document, insurance — matches the LC terms. This principle is the heart of every LC decision.

Why the Letter of Credit Matters in Trade Finance

Trade finance runs on trust, and the LC manufactures trust at scale. It protects both sides of a deal at once.

• For the seller: assured payment, because a bank stands behind the buyer.
• For the buyer: payment is released only when correct shipping documents are presented.
• For banks: fee income plus a controlled, document-based exposure.

In India. LC operations are governed by the Uniform Customs. Practice for Documentary Credits (UCP 600) published by the International Chamber of Commerce. Alongside RBI’s directions on trade credits. Always confirm the latest position on the most recent official IIBF notification before an exam.

Parties Involved in a Letter of Credit

Every LC transaction has a fixed cast of characters. Learning these roles makes the entire process click into place.

• Applicant – the buyer who requests the LC.
• Beneficiary – the seller or final recipient of the funds.
• Issuing bank &ndash. The bank that opens the LC and promises to pay.
• Advising bank &ndash. The bank in the seller’s country that authenticates the LC.
• Confirming bank (optional) &ndash. Adds its own guarantee on top of the issuing bank’s promise.
• Negotiating bank – examines documents and pays the beneficiary.

Note that one bank can play several roles. The advising bank, for example, often becomes the negotiating bank too. For an advance-payment deep dive, see our free guides on Red Clause and Green Clause LCs.

How a Letter of Credit Works: Step by Step

The flow of a typical LC transaction is logical and repeatable. Here is the journey from handshake to payment.

1. Buyer. Seller agree on a sale and choose to settle via an LC.
2. The buyer applies to the issuing bank. Which opens the LC in favour of the seller.
3. The LC is transmitted &mdash. Usually via SWIFT MT700 &mdash. To the advising bank in the seller’s country.
4. The seller ships the goods and gathers the required documents.
5. Documents (invoice. Bill of lading. Insurance, certificate of origin and more) are presented to the bank.
6. If the documents comply with LC terms. The bank releases payment to the seller.
7. The issuing bank then recovers the amount from the buyer.

Notice step 5. The whole outcome hinges on document compliance. Even a tiny mismatch &mdash.

A misspelt name or a wrong date &mdash. Can trigger a discrepancy and delay payment. Document discipline is everything.

Types of Letter of Credit Explained

Over time, many LC variants evolved to fit different trade scenarios. Below are the most common types of Letter of Credit every banker should recognise. Read them as a toolkit, not a memory dump.

1. Commercial LC

The standard LC, also called a documentary credit. It is the most widely used LC in international trade. The default form you will meet at a branch.

2. Export / Import LC

The same instrument carries two names based on the user. The exporter calls it an export LC. The importer calls it an import LC. The document does not change — only the viewpoint does.

3. Transferable LC

Lets the beneficiary transfer all or part of the payment rights to another supplier. This is ideal when the beneficiary is an intermediary sitting between the actual supplier. The buyer.

4. Un-transferable LC

Does not allow transfer to any third party. The named beneficiary is the sole recipient of funds.

5. Revocable LC

Can be altered or cancelled by the issuing bank or buyer at any time. Without notifying the seller. These are rarely used today because they offer no protection. Under UCP 600, every LC is treated as irrevocable unless stated otherwise.

6. Irrevocable LC

Cannot be modified or cancelled without consent from the beneficiary. Issuing bank and confirming bank (if any). This is the default and dominant form of LC in modern trade.

7. Standby LC (SBLC)

A safety net rather than a payment route. If the beneficiary proves the agreed payment was not made. The SBLC becomes payable. It behaves much like a bank guarantee. Is invoked only when something goes wrong.

8. Confirmed LC

Here a confirming bank adds its own guarantee to the issuing bank’s promise. Only irrevocable LCs can be confirmed. The beneficiary then enjoys two independent payment promises. Which is valuable when the issuing bank or country carries risk.

9. Unconfirmed LC

Backed only by the issuing bank, with no second-bank guarantee. Most LCs in practice are unconfirmed because confirmation adds cost.

10. Revolving LC

Covers multiple shipments under one umbrella LC. So a fresh credit is not needed for each transaction. It can revolve by time or by value. Which is perfect for ongoing supply relationships.

11. Back-to-Back LC

Common when an intermediary is involved. Two LCs are issued: the first by the buyer’s bank to the intermediary. And a second by the intermediary’s bank to the actual supplier &mdash. Using the first LC as collateral.

12. Red Clause LC

Allows a partial advance payment to the beneficiary before shipment. Against a written undertaking and a receipt. It helps exporters fund production or procurement.

13. Green Clause LC

An extension of the Red Clause LC. The advance is paid against an undertaking. A receipt. And additional proof of warehousing the goods in the exporter’s country.

14. Sight LC

Demands payment on submission of compliant documents. The bank reviews the paperwork. Pays the beneficiary almost immediately when everything is in order.

15. Deferred Payment LC (Usance LC)

Payment is made after an agreed period — for example 30. 60 or 90 days after shipment or presentation. The bank may verify documents early. But the actual payout is delayed, effectively extending credit to the buyer.

16. Direct Pay LC

The issuing bank pays the beneficiary directly. Later recovers from the buyer. The beneficiary may not interact with the buyer at all during settlement.

Letter of Credit Types: Quick Comparison Table

Use this comparison table for last-minute revision. It groups the LC types by purpose and key feature.

LC vs Bank Guarantee: What Is the Difference?

Students mix these up constantly, so fix the distinction now. The difference is about when the bank pays.

• An LC is a primary obligation. The bank pays first when documents comply.
• A bank guarantee (including SBLC) is a secondary obligation. It is invoked only if the applicant defaults.

Put simply: an LC expects payment to happen. While a guarantee hopes it never has to. This one line wins many exam questions.

How to Study Letters of Credit for JAIIB & CAIIB

You do not need to mug up all 16 types. Study smart instead. Follow this proven approach.

1. Learn the parties first. Once roles are clear. Every type becomes a small twist on the same base.
2. Group the types. Cluster them by purpose — security (irrevocable. Confirmed), timing (sight, usance), finance (red, green) and structure (transferable, back-to-back).
3. Master the document principle. Remember that banks deal in documents, not goods. Many MCQs test exactly this.
4. Anchor to UCP 600. Know that LCs are irrevocable by default. That ISBP guides document examination.
5. Practise with MCQs. Apply concepts under time pressure using our mock tests to lock in retention.

Revision tip: build a one-page table like the one above. Active recall from a compact sheet beats re-reading long notes every time.

Common Mistakes Aspirants Make

Avoid these frequent traps that cost easy marks in the exam hall.

• Confusing LC with bank guarantee. Remember: primary versus secondary obligation.
• Assuming banks inspect goods. They never do — only documents matter.
• Treating revocable LCs as common. They are obsolete; the default is irrevocable.
• Mixing Red and Green Clause. Green Clause adds the warehousing-proof condition.
• Ignoring confirmation rules. Only an irrevocable LC can be confirmed.
• Relying on outdated figures. Always confirm rules on the latest official IIBF notification.

Letters of Credit in 2026: The Digital Shift

Trade finance is going paperless, and the LC is evolving with it. The fundamentals stay the same, but the plumbing is faster.

The SWIFT MT700 series. Electronic bills of lading. Domestic messaging platforms such as SFMS have sped up LC processing dramatically.

Yet the bedrock principles of UCP 600 still drive every decision on document examination. Discrepancy handling and reimbursement. Technology changes the speed.

Not the rulebook — which is great news for exam aspirants.

Frequently Asked Questions

Q1. What is the main purpose of a Letter of Credit?

An LC reduces payment risk in trade. It assures the seller of payment. Since a bank stands behind the buyer. And assures the buyer that payment is released only when shipping documents are presented as per the agreed terms.

Q2. What is the difference between an LC and a bank guarantee?

An LC is a primary payment mechanism &mdash. The bank pays first when documents are compliant. A bank guarantee. Including an SBLC. Is a secondary obligation that is invoked only if the applicant defaults.

Q3. Who pays the LC charges?

Typically the applicant (buyer) bears the issuing bank’s charges. While the beneficiary (seller) bears the advising or confirming bank’s charges. Unless the sales contract states otherwise.

Q4. Which rules govern Letters of Credit?

Letters of Credit are governed primarily by UCP 600. Supplemented by ISBP for document examination practices. Both are published by the International Chamber of Commerce. Verify the current version on the latest official IIBF notification.

Q5. Is a Letter of Credit irrevocable by default?

Yes. Under UCP 600. Every LC is treated as irrevocable unless it clearly states otherwise. Revocable LCs are almost never used in modern trade. They give the seller no protection.

Conclusion: Turn LC Knowledge into Exam Marks

The Letter of Credit is more than an exam topic. It is the instrument that keeps world trade moving. One compliant document at a time.

Understand the parties. The process and the major types. And you hold a concept that pays off in both the exam hall.

The branch.

Keep your learning active. Revise the comparison table, drill MCQs, and always cross-check the latest rules. Consistency beats intensity. You are closer to clearing JAIIB. CAIIB or your IIBF certification than you think — so keep going.

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